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env: Add a silent env handler

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The silent variable now updates the global data flag anytime it is
changed as well as after the env relocation (in case its value is
different from the default env in such cases as NAND env)

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Joe Hershberger
2012-12-11 22:16:30 -06:00
committed by Tom Rini
parent 849d5d9cda
commit e080d545f8
3 changed files with 40 additions and 4 deletions
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14
doc/README.silent
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@@ -1,9 +1,15 @@
The config option CONFIG_SILENT_CONSOLE can be used to quiet messages
on the console. If the option has been enabled, the output can be
silenced by setting the environment variable "silent". The variable
is latched into the global data at an early stage in the boot process
so deleting it with "setenv" will not take effect until the system is
restarted.
silenced by setting the environment variable "silent".
- CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
When the "silent" variable is changed with env set, the change
will take effect immediately.
- CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
Some environments are not available until relocation (e.g. NAND)
so this will make the value in the flash env take effect at
relocation.
The following actions are taken if "silent" is set at boot time: